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In an arrangement to view the interferen...

In an arrangement to view the interference pattern produced by a wedge of liquid between a microscope slide and a glass block thhe interference pattern obtained is made is equal spaced parallel fringes. The fringe separation (or fringe width) can not be decreased by which of the following actions.

A

by increasing the angle of the liquid wedge

B

by using a liquid of smaller refractive index.

C

by using a thicker glass block.

D

by using a longer liquid wedge of the same angle.

Text Solution

Verified by Experts

The correct Answer is:
BCD
Fringe width `prop(Llamda)/(Dn)`
also fringe width `prop` thickness of glass block.
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ALLEN -WAVE OPTICS-Exercise 2 (Brain Teasures)
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  2. In figure, if a parallel beam of white light is incident on the plane ...

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  4. M(1) and M(2) are plane mirrors and kept parallel to each other. At po...

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  7. If one of the slit of a standard Young's double slit experiment is cov...

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  8. White light is used to illuminate the two slits in a Young's double sl...

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  9. In an interference arrangement similar to young's double slit experime...

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  10. plane waves refracted for air to water using Huygen.s principal a,b,c,...

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  11. A monochromatic light source of wavelength lamda is placed at S. three...

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  12. In a young's double slit experiment, green light is incident on the tw...

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  13. Two monochromatic (wavelength =a//5) and coherent sources of electroma...

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  14. In Young's double-slit experment, the frist maxima is observed at a fi...

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  15. To make the central fringe at the centerO , mica sheet of refractive i...

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  16. A thin slice is cut out of a glass cylinder along a plane parallel to ...

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  17. A circular planar wire loop is dipped in a soap solution and after tak...

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  18. Soap bubble appears coloured due to the phenomenon of

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